Table 1.

Contingency tables and odds ratios obtained from the paired daughter nodes (t_L, t_R)

	Paired daughter nodes
	Left daughter node (tL)		Right daughter node (tR)
	Outcome (Y)		Outcome (Y)
Trt	0	1	0	1
A	$n_{11}^L$	$n_{12}^L$	$n_{11}^R$	$n_{12}^R$
B	$n_{21}^L$	$n_{22}^L$	$n_{21}^R$	$n_{22}^R$
	$O{R}_L=(n_{11}^L{n}_{22}^L)/(n_{21}^L{n}_{12}^L)$		$O{R}_R=(n_{11}^R{n}_{22}^R)/(n_{21}^R{n}_{12}^R)$